Improvement in power-presses



2 Sheets-Sheet 1. A. H. MERRIMAN.

I POWER-PRESS. No.1,70,101, Patented Nov.16,1875'.

NFETERS, FNOTO-LITHOGRAFHER. WASHINGTON. D. C.

. whens-sheen.

A. H. MERRIMAN..

POWER-PRESS. Na,170,101. Patented Nov.16,187 5.

UNITED STATES PATENT OFFICE.

ALAN SON H. MERRIMAN, OF WEST MERIDEN, CONNECTICUT.

IMPROVEMENT IN POWER-PRESSES.

Specification forming part of Letters Patent N o. 170, 101, datedNovember 16, 1875; application filed A October 22, 1875.

To all whom it may concern:

Be it known that I, ALANSON H. MERRI MAN, of West Meriden, county of NewHaven and State of Connecticut, have invented certain new and usefulImprovements in Power- Press; and to enable others skilled in the art tomake and use the same, I will proceed to describe, referring to thedrawings, in which the same letters indicate like parts in each of thefigures.

In the accompanying drawings, Figure 1 is a side elevation of the bodyof the press, one

leg being removed to show the foot-lever device for operating theclutch, and a central section view of the balance-wheel and clutchdevice. Fig. 2 is a back-end elevation. Fig. 3 is a central section ofthe clutch-collar.

A is the body of the press. B is the operating-shaft, fitted into thehead of the press in the common way. C is the balance-wheel, fittedclosely, and turning freely upon the shaft B, having a clutch-dog, D,secured firmly into the end of its hub.

I propose to use one or more of these clutchdogs D, the object of whichis to save time in making connection; as, for instance, if there shouldbe a slow motion or revolution of the balance-wheel, and the latch ispressed inward instantly after passing the dog D, (when there is butone,) there will be nearly one revolution of the wheel lost time. Ifthere be two dogs, D, there could not be over one-half revolution of thewheel lost time; and if there were three, there could not be overone-third revolution of the wheel lost time. But, with a quick motion ofthe wheel, it is believed one dog, D, will work the best.

E is a clutch-collar, fitted and secured firmly upon the shaft B by akey, F, in close proximity to the hub of the balance-wheel. This collarmay be made round in its diameter; but I preferably flatten, or formparallel sides, and turn down a necking, E, on one end-that next to thebalance-wheel-to form a pathway for the clutch-dog D to revolve in. Inone edge of this collar is formed a groove, G, into which is fitted avibrating latch, H, hinged nearthe outer end by a pin,

I. Underneath this latch, upon the bottom and near the outer end cured aspring,

of the groove, is se- J, which serves to press out the inner end of thelatch, so that the dog D by the-revolution of come in direct latch, andcause balance-wheel.

The head of the screw which secures the spring J also serves as adetent, to prevent the dog D being thrown out too far.

K is a treadle-lever, secured by a pin in a stud, L, and vibrates in theend of a slitted stud, L, and is limited in itsvibrating movement (backand forth) by pins in the stud L. b is a pull-spindle, hinged to thelever K, just below the stud L, horizontally back through a bracket, 0.'A spiral spring, a, is placed onto the inner end of this spindle. Oneend of said spring bears against the bracket 0, and the other endagainst the screw-threaded collar d, fitted to the screw on the spindleb, by means of which the force or power of the spring is increased ordiminished.

On the upper end of this lever K is formed a circular guide, I", thediameter of which is larger than the diameter'of the clutch-collar, andthe bottom of its circle, directly under the shaft, is arranged closelyto the clutchcollar, so that the dog D on the latch H,

the balance-wheel, will contact with the end of the the shaft to revolvewith the when the pressure is removed from the treadle,

and the upper end of the lever is thrown back by the action of thespring a on spindle b, will strike the edge of the guide P, and bedepressed into the groove and out of contact with the dog D in the hubof the balancewheel, thus disengaging the clutch, and holding it untilthe pressure is upon treadle of the lever.

When it is desirable to lock the latch in its depressed condition, asshown in the guide in Fig. 2, a pivot is inserted through the collar andlatch, or by turning the set-screw 0 into an orifice in the latch.

While in this locked condition, it will be impossible by the revolutionof the wheel to cause a movement of the shaft.

Thus, it will be seen that, by pressing down the treadle, (after thelatch is unfastened,) the dog D will come in contact with the end of thelatch H, and cause the shaft to revolve with the balance-wheel; and whenthe press are is removed from the treadle, the pullrod and spring willthrow back the upper end of again produced -1he lever and guide directlyin contact with I more, in the hub of Wheel 0, guide P, and lethe dog D,and bring the common tool-stock ver K, substantially as and for thepurpose always in an elevated position. set forth.

What I claim and desire to secure by Let- I 1 tars Patent ALANSON H.MERRIMAN. [L. s.]

The combination and arrangement, in a Witnesses: power-press, of theclutch-collar E, latch H, DE WI'LT C(BURROWS,

spring J upon the shaft B, dog D, one or JEREMY W. BLISS.

